bytecode.c 33.5 KB
Newer Older
Jim Blandy's avatar
Jim Blandy committed
1
/* Execution of byte code produced by bytecomp.el.
2
   Copyright (C) 1985, 1986, 1987, 1988, 1993, 2000, 2001, 2002, 2003, 2004,
Glenn Morris's avatar
Glenn Morris committed
3
                 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
Jim Blandy's avatar
Jim Blandy committed
4 5 6

This file is part of GNU Emacs.

7
GNU Emacs is free software: you can redistribute it and/or modify
Jim Blandy's avatar
Jim Blandy committed
8
it under the terms of the GNU General Public License as published by
9 10
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Jim Blandy's avatar
Jim Blandy committed
11 12 13 14 15 16 17

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
18
along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
Jim Blandy's avatar
Jim Blandy committed
19

20
/*
21
hacked on by jwz@lucid.com 17-jun-91
Jim Blandy's avatar
Jim Blandy committed
22 23
  o  added a compile-time switch to turn on simple sanity checking;
  o  put back the obsolete byte-codes for error-detection;
24
  o  added a new instruction, unbind_all, which I will use for
Jim Blandy's avatar
Jim Blandy committed
25
     tail-recursion elimination;
26
  o  made temp_output_buffer_show be called with the right number
Jim Blandy's avatar
Jim Blandy committed
27 28 29 30 31
     of args;
  o  made the new bytecodes be called with args in the right order;
  o  added metering support.

by Hallvard:
32
  o  added relative jump instructions;
Jim Blandy's avatar
Jim Blandy committed
33 34 35
  o  all conditionals now only do QUIT if they jump.
 */

36
#include <config.h>
Jim Blandy's avatar
Jim Blandy committed
37 38
#include "lisp.h"
#include "buffer.h"
39
#include "character.h"
Jim Blandy's avatar
Jim Blandy committed
40
#include "syntax.h"
Stefan Monnier's avatar
Stefan Monnier committed
41
#include "window.h"
Jim Blandy's avatar
Jim Blandy committed
42

43 44 45 46 47
#ifdef CHECK_FRAME_FONT
#include "frame.h"
#include "xterm.h"
#endif

48
/*
49
 * define BYTE_CODE_SAFE to enable some minor sanity checking (useful for
50 51
 * debugging the byte compiler...)
 *
52
 * define BYTE_CODE_METER to enable generation of a byte-op usage histogram.
Jim Blandy's avatar
Jim Blandy committed
53
 */
54 55
/* #define BYTE_CODE_SAFE */
/* #define BYTE_CODE_METER */
Jim Blandy's avatar
Jim Blandy committed
56 57 58 59


#ifdef BYTE_CODE_METER

60
Lisp_Object Vbyte_code_meter, Qbyte_code_meter;
Jim Blandy's avatar
Jim Blandy committed
61 62
int byte_metering_on;

63
#define METER_2(code1, code2) \
Jim Blandy's avatar
Jim Blandy committed
64 65 66
  XFASTINT (XVECTOR (XVECTOR (Vbyte_code_meter)->contents[(code1)]) \
	    ->contents[(code2)])

67 68
#define METER_1(code) METER_2 (0, (code))

69 70 71 72 73 74 75 76 77 78
#define METER_CODE(last_code, this_code)				\
{									\
  if (byte_metering_on)							\
    {									\
      if (METER_1 (this_code) < MOST_POSITIVE_FIXNUM)			\
        METER_1 (this_code)++;						\
      if (last_code							\
	  && METER_2 (last_code, this_code) < MOST_POSITIVE_FIXNUM)	\
        METER_2 (last_code, this_code)++;				\
    }									\
79
}
Jim Blandy's avatar
Jim Blandy committed
80

81
#else /* no BYTE_CODE_METER */
Jim Blandy's avatar
Jim Blandy committed
82

83
#define METER_CODE(last_code, this_code)
Richard M. Stallman's avatar
Richard M. Stallman committed
84

85
#endif /* no BYTE_CODE_METER */
Jim Blandy's avatar
Jim Blandy committed
86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116


Lisp_Object Qbytecode;

/*  Byte codes: */

#define Bvarref 010
#define Bvarset 020
#define Bvarbind 030
#define Bcall 040
#define Bunbind 050

#define Bnth 070
#define Bsymbolp 071
#define Bconsp 072
#define Bstringp 073
#define Blistp 074
#define Beq 075
#define Bmemq 076
#define Bnot 077
#define Bcar 0100
#define Bcdr 0101
#define Bcons 0102
#define Blist1 0103
#define Blist2 0104
#define Blist3 0105
#define Blist4 0106
#define Blength 0107
#define Baref 0110
#define Baset 0111
#define Bsymbol_value 0112
117
#define Bsymbol_function 0113
Jim Blandy's avatar
Jim Blandy committed
118
#define Bset 0114
119
#define Bfset 0115
Jim Blandy's avatar
Jim Blandy committed
120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139
#define Bget 0116
#define Bsubstring 0117
#define Bconcat2 0120
#define Bconcat3 0121
#define Bconcat4 0122
#define Bsub1 0123
#define Badd1 0124
#define Beqlsign 0125
#define Bgtr 0126
#define Blss 0127
#define Bleq 0130
#define Bgeq 0131
#define Bdiff 0132
#define Bnegate 0133
#define Bplus 0134
#define Bmax 0135
#define Bmin 0136
#define Bmult 0137

#define Bpoint 0140
140 141
/* Was Bmark in v17.  */
#define Bsave_current_buffer 0141
Jim Blandy's avatar
Jim Blandy committed
142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157
#define Bgoto_char 0142
#define Binsert 0143
#define Bpoint_max 0144
#define Bpoint_min 0145
#define Bchar_after 0146
#define Bfollowing_char 0147
#define Bpreceding_char 0150
#define Bcurrent_column 0151
#define Bindent_to 0152
#define Bscan_buffer 0153 /* No longer generated as of v18 */
#define Beolp 0154
#define Beobp 0155
#define Bbolp 0156
#define Bbobp 0157
#define Bcurrent_buffer 0160
#define Bset_buffer 0161
Richard M. Stallman's avatar
Richard M. Stallman committed
158
#define Bsave_current_buffer_1 0162 /* Replacing Bsave_current_buffer.  */
159
#define Bread_char 0162 /* No longer generated as of v19 */
Jim Blandy's avatar
Jim Blandy committed
160 161 162 163 164 165 166 167 168 169 170 171 172
#define Bset_mark 0163 /* this loser is no longer generated as of v18 */
#define Binteractive_p 0164 /* Needed since interactive-p takes unevalled args */

#define Bforward_char 0165
#define Bforward_word 0166
#define Bskip_chars_forward 0167
#define Bskip_chars_backward 0170
#define Bforward_line 0171
#define Bchar_syntax 0172
#define Bbuffer_substring 0173
#define Bdelete_region 0174
#define Bnarrow_to_region 0175
#define Bwiden 0176
173
#define Bend_of_line 0177
Jim Blandy's avatar
Jim Blandy committed
174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196

#define Bconstant2 0201
#define Bgoto 0202
#define Bgotoifnil 0203
#define Bgotoifnonnil 0204
#define Bgotoifnilelsepop 0205
#define Bgotoifnonnilelsepop 0206
#define Breturn 0207
#define Bdiscard 0210
#define Bdup 0211

#define Bsave_excursion 0212
#define Bsave_window_excursion 0213
#define Bsave_restriction 0214
#define Bcatch 0215

#define Bunwind_protect 0216
#define Bcondition_case 0217
#define Btemp_output_buffer_setup 0220
#define Btemp_output_buffer_show 0221

#define Bunbind_all 0222

197 198 199 200 201 202
#define Bset_marker 0223
#define Bmatch_beginning 0224
#define Bmatch_end 0225
#define Bupcase 0226
#define Bdowncase 0227

Jim Blandy's avatar
Jim Blandy committed
203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220
#define Bstringeqlsign 0230
#define Bstringlss 0231
#define Bequal 0232
#define Bnthcdr 0233
#define Belt 0234
#define Bmember 0235
#define Bassq 0236
#define Bnreverse 0237
#define Bsetcar 0240
#define Bsetcdr 0241
#define Bcar_safe 0242
#define Bcdr_safe 0243
#define Bnconc 0244
#define Bquo 0245
#define Brem 0246
#define Bnumberp 0247
#define Bintegerp 0250

221 222 223 224 225 226 227 228 229 230
#define BRgoto 0252
#define BRgotoifnil 0253
#define BRgotoifnonnil 0254
#define BRgotoifnilelsepop 0255
#define BRgotoifnonnilelsepop 0256

#define BlistN 0257
#define BconcatN 0260
#define BinsertN 0261

Jim Blandy's avatar
Jim Blandy committed
231 232
#define Bconstant 0300
#define CONSTANTLIM 0100
Gerd Moellmann's avatar
Gerd Moellmann committed
233

234

Gerd Moellmann's avatar
Gerd Moellmann committed
235 236 237 238 239 240 241
/* Structure describing a value stack used during byte-code execution
   in Fbyte_code.  */

struct byte_stack
{
  /* Program counter.  This points into the byte_string below
     and is relocated when that string is relocated.  */
242
  const unsigned char *pc;
Gerd Moellmann's avatar
Gerd Moellmann committed
243 244 245 246 247 248 249 250 251

  /* Top and bottom of stack.  The bottom points to an area of memory
     allocated with alloca in Fbyte_code.  */
  Lisp_Object *top, *bottom;

  /* The string containing the byte-code, and its current address.
     Storing this here protects it from GC because mark_byte_stack
     marks it.  */
  Lisp_Object byte_string;
252
  const unsigned char *byte_string_start;
Gerd Moellmann's avatar
Gerd Moellmann committed
253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269

  /* The vector of constants used during byte-code execution.  Storing
     this here protects it from GC because mark_byte_stack marks it.  */
  Lisp_Object constants;

  /* Next entry in byte_stack_list.  */
  struct byte_stack *next;
};

/* A list of currently active byte-code execution value stacks.
   Fbyte_code adds an entry to the head of this list before it starts
   processing byte-code, and it removed the entry again when it is
   done.  Signalling an error truncates the list analoguous to
   gcprolist.  */

struct byte_stack *byte_stack_list;

270

Gerd Moellmann's avatar
Gerd Moellmann committed
271 272 273 274 275 276 277 278 279 280
/* Mark objects on byte_stack_list.  Called during GC.  */

void
mark_byte_stack ()
{
  struct byte_stack *stack;
  Lisp_Object *obj;

  for (stack = byte_stack_list; stack; stack = stack->next)
    {
281 282 283 284 285 286 287
      /* If STACK->top is null here, this means there's an opcode in
	 Fbyte_code that wasn't expected to GC, but did.  To find out
	 which opcode this is, record the value of `stack', and walk
	 up the stack in a debugger, stopping in frames of Fbyte_code.
	 The culprit is found in the frame of Fbyte_code where the
	 address of its local variable `stack' is equal to the
	 recorded value of `stack' here.  */
Kenichi Handa's avatar
Kenichi Handa committed
288
      eassert (stack->top);
289

Gerd Moellmann's avatar
Gerd Moellmann committed
290
      for (obj = stack->bottom; obj <= stack->top; ++obj)
Kenichi Handa's avatar
Kenichi Handa committed
291
	mark_object (*obj);
292

Kenichi Handa's avatar
Kenichi Handa committed
293 294
      mark_object (stack->byte_string);
      mark_object (stack->constants);
Gerd Moellmann's avatar
Gerd Moellmann committed
295 296 297 298
    }
}


299 300
/* Unmark objects in the stacks on byte_stack_list.  Relocate program
   counters.  Called when GC has completed.  */
Gerd Moellmann's avatar
Gerd Moellmann committed
301

302
void
303
unmark_byte_stack ()
Gerd Moellmann's avatar
Gerd Moellmann committed
304 305 306 307
{
  struct byte_stack *stack;

  for (stack = byte_stack_list; stack; stack = stack->next)
308
    {
309
      if (stack->byte_string_start != SDATA (stack->byte_string))
310 311
	{
	  int offset = stack->pc - stack->byte_string_start;
312
	  stack->byte_string_start = SDATA (stack->byte_string);
313 314 315
	  stack->pc = stack->byte_string_start + offset;
	}
    }
Gerd Moellmann's avatar
Gerd Moellmann committed
316 317
}

Jim Blandy's avatar
Jim Blandy committed
318 319 320

/* Fetch the next byte from the bytecode stream */

Gerd Moellmann's avatar
Gerd Moellmann committed
321
#define FETCH *stack.pc++
Jim Blandy's avatar
Jim Blandy committed
322

323 324
/* Fetch two bytes from the bytecode stream and make a 16-bit number
   out of them */
Jim Blandy's avatar
Jim Blandy committed
325 326 327

#define FETCH2 (op = FETCH, op + (FETCH << 8))

328 329 330 331
/* Push x onto the execution stack.  This used to be #define PUSH(x)
   (*++stackp = (x)) This oddity is necessary because Alliant can't be
   bothered to compile the preincrement operator properly, as of 4/91.
   -JimB */
Gerd Moellmann's avatar
Gerd Moellmann committed
332 333

#define PUSH(x) (top++, *top = (x))
Jim Blandy's avatar
Jim Blandy committed
334 335 336

/* Pop a value off the execution stack.  */

Gerd Moellmann's avatar
Gerd Moellmann committed
337
#define POP (*top--)
Jim Blandy's avatar
Jim Blandy committed
338 339 340

/* Discard n values from the execution stack.  */

Gerd Moellmann's avatar
Gerd Moellmann committed
341 342 343 344 345 346
#define DISCARD(n) (top -= (n))

/* Get the value which is at the top of the execution stack, but don't
   pop it. */

#define TOP (*top)
Jim Blandy's avatar
Jim Blandy committed
347

348
/* Actions that must be performed before and after calling a function
Gerd Moellmann's avatar
Gerd Moellmann committed
349
   that might GC.  */
Jim Blandy's avatar
Jim Blandy committed
350

Gerd Moellmann's avatar
Gerd Moellmann committed
351 352
#define BEFORE_POTENTIAL_GC()	stack.top = top
#define AFTER_POTENTIAL_GC()	stack.top = NULL
Jim Blandy's avatar
Jim Blandy committed
353

Richard M. Stallman's avatar
Richard M. Stallman committed
354 355 356
/* Garbage collect if we have consed enough since the last time.
   We do this at every branch, to avoid loops that never GC.  */

357 358 359 360 361 362 363 364
#define MAYBE_GC()					\
  if (consing_since_gc > gc_cons_threshold		\
      && consing_since_gc > gc_relative_threshold)	\
    {							\
      BEFORE_POTENTIAL_GC ();				\
      Fgarbage_collect ();				\
      AFTER_POTENTIAL_GC ();				\
    }							\
365 366
  else

367
/* Check for jumping out of range.  */
Gerd Moellmann's avatar
Gerd Moellmann committed
368 369 370

#ifdef BYTE_CODE_SAFE

371
#define CHECK_RANGE(ARG) \
372 373
  if (ARG >= bytestr_length) abort ()

374
#else /* not BYTE_CODE_SAFE */
Gerd Moellmann's avatar
Gerd Moellmann committed
375 376 377

#define CHECK_RANGE(ARG)

378
#endif /* not BYTE_CODE_SAFE */
Gerd Moellmann's avatar
Gerd Moellmann committed
379

Gerd Moellmann's avatar
Gerd Moellmann committed
380 381 382 383 384 385 386
/* A version of the QUIT macro which makes sure that the stack top is
   set before signaling `quit'.  */

#define BYTE_CODE_QUIT					\
  do {							\
    if (!NILP (Vquit_flag) && NILP (Vinhibit_quit))	\
      {							\
387
        Lisp_Object flag = Vquit_flag;			\
Gerd Moellmann's avatar
Gerd Moellmann committed
388 389
	Vquit_flag = Qnil;				\
        BEFORE_POTENTIAL_GC ();				\
390
	if (EQ (Vthrow_on_input, flag))			\
391
	  Fthrow (Vthrow_on_input, Qt);			\
Gerd Moellmann's avatar
Gerd Moellmann committed
392
	Fsignal (Qquit, Qnil);				\
393
	AFTER_POTENTIAL_GC ();				\
Gerd Moellmann's avatar
Gerd Moellmann committed
394 395 396
      }							\
  } while (0)

Gerd Moellmann's avatar
Gerd Moellmann committed
397

Jim Blandy's avatar
Jim Blandy committed
398
DEFUN ("byte-code", Fbyte_code, Sbyte_code, 3, 3, 0,
399 400 401 402 403 404
       doc: /* Function used internally in byte-compiled code.
The first argument, BYTESTR, is a string of byte code;
the second, VECTOR, a vector of constants;
the third, MAXDEPTH, the maximum stack depth used in this function.
If the third argument is incorrect, Emacs may crash.  */)
     (bytestr, vector, maxdepth)
Jim Blandy's avatar
Jim Blandy committed
405 406
     Lisp_Object bytestr, vector, maxdepth;
{
Juanma Barranquero's avatar
Juanma Barranquero committed
407
  int count = SPECPDL_INDEX ();
Jim Blandy's avatar
Jim Blandy committed
408 409 410 411
#ifdef BYTE_CODE_METER
  int this_op = 0;
  int prev_op;
#endif
Gerd Moellmann's avatar
Gerd Moellmann committed
412
  int op;
413
  /* Lisp_Object v1, v2; */
414
  Lisp_Object *vectorp;
Jim Blandy's avatar
Jim Blandy committed
415
#ifdef BYTE_CODE_SAFE
Gerd Moellmann's avatar
Gerd Moellmann committed
416 417
  int const_length = XVECTOR (vector)->size;
  Lisp_Object *stacke;
Jim Blandy's avatar
Jim Blandy committed
418
#endif
419
  int bytestr_length;
Gerd Moellmann's avatar
Gerd Moellmann committed
420 421
  struct byte_stack stack;
  Lisp_Object *top;
422
  Lisp_Object result;
Jim Blandy's avatar
Jim Blandy committed
423

424
#if 0 /* CHECK_FRAME_FONT */
425 426 427 428 429 430 431 432 433
 {
   struct frame *f = SELECTED_FRAME ();
   if (FRAME_X_P (f)
       && FRAME_FONT (f)->direction != 0
       && FRAME_FONT (f)->direction != 1)
     abort ();
 }
#endif

434
  CHECK_STRING (bytestr);
Kim F. Storm's avatar
Kim F. Storm committed
435
  CHECK_VECTOR (vector);
436
  CHECK_NUMBER (maxdepth);
Jim Blandy's avatar
Jim Blandy committed
437

438 439 440 441 442
  if (STRING_MULTIBYTE (bytestr))
    /* BYTESTR must have been produced by Emacs 20.2 or the earlier
       because they produced a raw 8-bit string for byte-code and now
       such a byte-code string is loaded as multibyte while raw 8-bit
       characters converted to multibyte form.  Thus, now we must
443
       convert them back to the originally intended unibyte form.  */
444
    bytestr = Fstring_as_unibyte (bytestr);
445

446
  bytestr_length = SBYTES (bytestr);
447 448
  vectorp = XVECTOR (vector)->contents;

Gerd Moellmann's avatar
Gerd Moellmann committed
449
  stack.byte_string = bytestr;
450
  stack.pc = stack.byte_string_start = SDATA (bytestr);
Gerd Moellmann's avatar
Gerd Moellmann committed
451
  stack.constants = vector;
452
  stack.bottom = (Lisp_Object *) alloca (XFASTINT (maxdepth)
Gerd Moellmann's avatar
Gerd Moellmann committed
453 454 455 456 457
                                         * sizeof (Lisp_Object));
  top = stack.bottom - 1;
  stack.top = NULL;
  stack.next = byte_stack_list;
  byte_stack_list = &stack;
Jim Blandy's avatar
Jim Blandy committed
458

Gerd Moellmann's avatar
Gerd Moellmann committed
459 460 461
#ifdef BYTE_CODE_SAFE
  stacke = stack.bottom - 1 + XFASTINT (maxdepth);
#endif
462

Jim Blandy's avatar
Jim Blandy committed
463 464 465
  while (1)
    {
#ifdef BYTE_CODE_SAFE
466
      if (top > stacke)
467
	abort ();
Gerd Moellmann's avatar
Gerd Moellmann committed
468
      else if (top < stack.bottom - 1)
469
	abort ();
Jim Blandy's avatar
Jim Blandy committed
470 471 472 473 474 475 476
#endif

#ifdef BYTE_CODE_METER
      prev_op = this_op;
      this_op = op = FETCH;
      METER_CODE (prev_op, op);
#else
477
      op = FETCH;
Jim Blandy's avatar
Jim Blandy committed
478 479
#endif

480 481 482
      switch (op)
	{
	case Bvarref + 7:
Jim Blandy's avatar
Jim Blandy committed
483 484 485
	  op = FETCH2;
	  goto varref;

486 487 488
	case Bvarref:
	case Bvarref + 1:
	case Bvarref + 2:
489
	case Bvarref + 3:
490
	case Bvarref + 4:
491
	case Bvarref + 5:
Jim Blandy's avatar
Jim Blandy committed
492
	  op = op - Bvarref;
493 494 495 496 497 498
	  goto varref;

	/* This seems to be the most frequently executed byte-code
	   among the Bvarref's, so avoid a goto here.  */
	case Bvarref+6:
	  op = FETCH;
Jim Blandy's avatar
Jim Blandy committed
499
	varref:
500 501 502 503 504 505
	  {
	    Lisp_Object v1, v2;

	    v1 = vectorp[op];
	    if (SYMBOLP (v1))
	      {
506
		v2 = SYMBOL_VALUE (v1);
507
		if (MISCP (v2) || EQ (v2, Qunbound))
508 509 510 511 512
		  {
		    BEFORE_POTENTIAL_GC ();
		    v2 = Fsymbol_value (v1);
		    AFTER_POTENTIAL_GC ();
		  }
513 514
	      }
	    else
515 516 517 518 519
	      {
		BEFORE_POTENTIAL_GC ();
		v2 = Fsymbol_value (v1);
		AFTER_POTENTIAL_GC ();
	      }
520 521 522 523 524
	    PUSH (v2);
	    break;
	  }

	case Bgotoifnil:
525 526 527 528 529 530 531 532 533 534 535 536 537
	  {
	    Lisp_Object v1;
	    MAYBE_GC ();
	    op = FETCH2;
	    v1 = POP;
	    if (NILP (v1))
	      {
		BYTE_CODE_QUIT;
		CHECK_RANGE (op);
		stack.pc = stack.byte_string_start + op;
	      }
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
538

539 540 541 542
	case Bcar:
	  {
	    Lisp_Object v1;
	    v1 = TOP;
543
	    TOP = CAR (v1);
544 545 546 547 548 549 550 551 552 553 554 555 556 557
	    break;
	  }

	case Beq:
	  {
	    Lisp_Object v1;
	    v1 = POP;
	    TOP = EQ (v1, TOP) ? Qt : Qnil;
	    break;
	  }

	case Bmemq:
	  {
	    Lisp_Object v1;
558
	    BEFORE_POTENTIAL_GC ();
559 560
	    v1 = POP;
	    TOP = Fmemq (TOP, v1);
561
	    AFTER_POTENTIAL_GC ();
562 563 564 565 566 567 568
	    break;
	  }

	case Bcdr:
	  {
	    Lisp_Object v1;
	    v1 = TOP;
569
	    TOP = CDR (v1);
570 571
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
572

573 574 575 576 577 578 579
	case Bvarset:
	case Bvarset+1:
	case Bvarset+2:
	case Bvarset+3:
	case Bvarset+4:
	case Bvarset+5:
	  op -= Bvarset;
Jim Blandy's avatar
Jim Blandy committed
580 581
	  goto varset;

582 583
	case Bvarset+7:
	  op = FETCH2;
584 585 586 587
	  goto varset;

	case Bvarset+6:
	  op = FETCH;
Jim Blandy's avatar
Jim Blandy committed
588
	varset:
589 590
	  {
	    Lisp_Object sym, val;
591

592
	    sym = vectorp[op];
593
	    val = TOP;
594 595 596 597

	    /* Inline the most common case.  */
	    if (SYMBOLP (sym)
		&& !EQ (val, Qunbound)
598
		&& !XSYMBOL (sym)->indirect_variable
599
		&& !SYMBOL_CONSTANT_P (sym)
600
		&& !MISCP (XSYMBOL (sym)->value))
601 602
	      XSYMBOL (sym)->value = val;
	    else
603 604 605 606 607
	      {
		BEFORE_POTENTIAL_GC ();
		set_internal (sym, val, current_buffer, 0);
		AFTER_POTENTIAL_GC ();
	      }
608
	  }
609
	  (void) POP;
Jim Blandy's avatar
Jim Blandy committed
610 611
	  break;

612 613 614 615 616 617 618 619 620 621
	case Bdup:
	  {
	    Lisp_Object v1;
	    v1 = TOP;
	    PUSH (v1);
	    break;
	  }

	/* ------------------ */

Jim Blandy's avatar
Jim Blandy committed
622 623 624 625 626 627 628 629
	case Bvarbind+6:
	  op = FETCH;
	  goto varbind;

	case Bvarbind+7:
	  op = FETCH2;
	  goto varbind;

630 631 632 633 634 635
	case Bvarbind:
	case Bvarbind+1:
	case Bvarbind+2:
	case Bvarbind+3:
	case Bvarbind+4:
	case Bvarbind+5:
Jim Blandy's avatar
Jim Blandy committed
636 637
	  op -= Bvarbind;
	varbind:
638 639
	  /* Specbind can signal and thus GC.  */
	  BEFORE_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
640
	  specbind (vectorp[op], POP);
641
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
642 643 644 645 646 647 648 649 650 651
	  break;

	case Bcall+6:
	  op = FETCH;
	  goto docall;

	case Bcall+7:
	  op = FETCH2;
	  goto docall;

652 653 654 655 656 657
	case Bcall:
	case Bcall+1:
	case Bcall+2:
	case Bcall+3:
	case Bcall+4:
	case Bcall+5:
Jim Blandy's avatar
Jim Blandy committed
658 659
	  op -= Bcall;
	docall:
660
	  {
661
	    BEFORE_POTENTIAL_GC ();
662
	    DISCARD (op);
663
#ifdef BYTE_CODE_METER
664 665 666 667 668 669 670
	    if (byte_metering_on && SYMBOLP (TOP))
	      {
		Lisp_Object v1, v2;

		v1 = TOP;
		v2 = Fget (v1, Qbyte_code_meter);
		if (INTEGERP (v2)
671
		    && XINT (v2) < MOST_POSITIVE_FIXNUM)
672 673 674 675 676
		  {
		    XSETINT (v2, XINT (v2) + 1);
		    Fput (v1, Qbyte_code_meter, v2);
		  }
	      }
677
#endif
678 679 680 681
	    TOP = Ffuncall (op + 1, &TOP);
	    AFTER_POTENTIAL_GC ();
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
682 683 684 685 686 687 688 689 690

	case Bunbind+6:
	  op = FETCH;
	  goto dounbind;

	case Bunbind+7:
	  op = FETCH2;
	  goto dounbind;

691 692 693 694 695 696
	case Bunbind:
	case Bunbind+1:
	case Bunbind+2:
	case Bunbind+3:
	case Bunbind+4:
	case Bunbind+5:
Jim Blandy's avatar
Jim Blandy committed
697 698
	  op -= Bunbind;
	dounbind:
Gerd Moellmann's avatar
Gerd Moellmann committed
699
	  BEFORE_POTENTIAL_GC ();
Juanma Barranquero's avatar
Juanma Barranquero committed
700
	  unbind_to (SPECPDL_INDEX () - op, Qnil);
Gerd Moellmann's avatar
Gerd Moellmann committed
701
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
702 703 704 705
	  break;

	case Bunbind_all:
	  /* To unbind back to the beginning of this frame.  Not used yet,
706
	     but will be needed for tail-recursion elimination.  */
Gerd Moellmann's avatar
Gerd Moellmann committed
707
	  BEFORE_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
708
	  unbind_to (count, Qnil);
Gerd Moellmann's avatar
Gerd Moellmann committed
709
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
710 711 712
	  break;

	case Bgoto:
Richard M. Stallman's avatar
Richard M. Stallman committed
713
	  MAYBE_GC ();
Gerd Moellmann's avatar
Gerd Moellmann committed
714
	  BYTE_CODE_QUIT;
Jim Blandy's avatar
Jim Blandy committed
715
	  op = FETCH2;    /* pc = FETCH2 loses since FETCH2 contains pc++ */
716
	  CHECK_RANGE (op);
Gerd Moellmann's avatar
Gerd Moellmann committed
717
	  stack.pc = stack.byte_string_start + op;
Jim Blandy's avatar
Jim Blandy committed
718 719 720
	  break;

	case Bgotoifnonnil:
721 722 723 724 725 726 727 728 729 730 731 732 733
	  {
	    Lisp_Object v1;
	    MAYBE_GC ();
	    op = FETCH2;
	    v1 = POP;
	    if (!NILP (v1))
	      {
		BYTE_CODE_QUIT;
		CHECK_RANGE (op);
		stack.pc = stack.byte_string_start + op;
	      }
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
734 735

	case Bgotoifnilelsepop:
Richard M. Stallman's avatar
Richard M. Stallman committed
736
	  MAYBE_GC ();
Jim Blandy's avatar
Jim Blandy committed
737
	  op = FETCH2;
Joseph Arceneaux's avatar
Joseph Arceneaux committed
738
	  if (NILP (TOP))
Jim Blandy's avatar
Jim Blandy committed
739
	    {
Gerd Moellmann's avatar
Gerd Moellmann committed
740
	      BYTE_CODE_QUIT;
741
	      CHECK_RANGE (op);
Gerd Moellmann's avatar
Gerd Moellmann committed
742
	      stack.pc = stack.byte_string_start + op;
Jim Blandy's avatar
Jim Blandy committed
743
	    }
744
	  else DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
745 746 747
	  break;

	case Bgotoifnonnilelsepop:
Richard M. Stallman's avatar
Richard M. Stallman committed
748
	  MAYBE_GC ();
Jim Blandy's avatar
Jim Blandy committed
749
	  op = FETCH2;
Joseph Arceneaux's avatar
Joseph Arceneaux committed
750
	  if (!NILP (TOP))
Jim Blandy's avatar
Jim Blandy committed
751
	    {
Gerd Moellmann's avatar
Gerd Moellmann committed
752
	      BYTE_CODE_QUIT;
753
	      CHECK_RANGE (op);
Gerd Moellmann's avatar
Gerd Moellmann committed
754
	      stack.pc = stack.byte_string_start + op;
Jim Blandy's avatar
Jim Blandy committed
755
	    }
756 757 758 759
	  else DISCARD (1);
	  break;

	case BRgoto:
Richard M. Stallman's avatar
Richard M. Stallman committed
760
	  MAYBE_GC ();
Gerd Moellmann's avatar
Gerd Moellmann committed
761
	  BYTE_CODE_QUIT;
Gerd Moellmann's avatar
Gerd Moellmann committed
762
	  stack.pc += (int) *stack.pc - 127;
763 764 765
	  break;

	case BRgotoifnil:
766 767 768 769 770 771 772 773 774 775 776 777
	  {
	    Lisp_Object v1;
	    MAYBE_GC ();
	    v1 = POP;
	    if (NILP (v1))
	      {
		BYTE_CODE_QUIT;
		stack.pc += (int) *stack.pc - 128;
	      }
	    stack.pc++;
	    break;
	  }
778 779

	case BRgotoifnonnil:
780 781 782 783 784 785 786 787 788 789 790 791
	  {
	    Lisp_Object v1;
	    MAYBE_GC ();
	    v1 = POP;
	    if (!NILP (v1))
	      {
		BYTE_CODE_QUIT;
		stack.pc += (int) *stack.pc - 128;
	      }
	    stack.pc++;
	    break;
	  }
792 793

	case BRgotoifnilelsepop:
Richard M. Stallman's avatar
Richard M. Stallman committed
794
	  MAYBE_GC ();
Gerd Moellmann's avatar
Gerd Moellmann committed
795
	  op = *stack.pc++;
796 797
	  if (NILP (TOP))
	    {
Gerd Moellmann's avatar
Gerd Moellmann committed
798
	      BYTE_CODE_QUIT;
Gerd Moellmann's avatar
Gerd Moellmann committed
799
	      stack.pc += op - 128;
800 801 802 803 804
	    }
	  else DISCARD (1);
	  break;

	case BRgotoifnonnilelsepop:
Richard M. Stallman's avatar
Richard M. Stallman committed
805
	  MAYBE_GC ();
Gerd Moellmann's avatar
Gerd Moellmann committed
806
	  op = *stack.pc++;
807 808
	  if (!NILP (TOP))
	    {
Gerd Moellmann's avatar
Gerd Moellmann committed
809
	      BYTE_CODE_QUIT;
Gerd Moellmann's avatar
Gerd Moellmann committed
810
	      stack.pc += op - 128;
811 812
	    }
	  else DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
813 814
	  break;

Jim Blandy's avatar
Jim Blandy committed
815
	case Breturn:
816
	  result = POP;
Jim Blandy's avatar
Jim Blandy committed
817 818 819
	  goto exit;

	case Bdiscard:
820
	  DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
821 822 823 824 825 826 827
	  break;

	case Bconstant2:
	  PUSH (vectorp[FETCH2]);
	  break;

	case Bsave_excursion:
828 829
	  record_unwind_protect (save_excursion_restore,
				 save_excursion_save ());
Jim Blandy's avatar
Jim Blandy committed
830 831
	  break;

832
	case Bsave_current_buffer:
Richard M. Stallman's avatar
Richard M. Stallman committed
833
	case Bsave_current_buffer_1:
834
	  record_unwind_protect (set_buffer_if_live, Fcurrent_buffer ());
835 836
	  break;

Jim Blandy's avatar
Jim Blandy committed
837
	case Bsave_window_excursion:
838
	  BEFORE_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
839
	  TOP = Fsave_window_excursion (TOP);
840
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
841 842 843
	  break;

	case Bsave_restriction:
844 845
	  record_unwind_protect (save_restriction_restore,
				 save_restriction_save ());
Jim Blandy's avatar
Jim Blandy committed
846 847 848
	  break;

	case Bcatch:
849 850 851
	  {
	    Lisp_Object v1;
	    BEFORE_POTENTIAL_GC ();
852
	    v1 = POP;
853 854 855 856
	    TOP = internal_catch (TOP, Feval, v1);
	    AFTER_POTENTIAL_GC ();
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
857 858

	case Bunwind_protect:
859
	  record_unwind_protect (Fprogn, POP);
Jim Blandy's avatar
Jim Blandy committed
860 861 862
	  break;

	case Bcondition_case:
863
	  {
864 865 866
	    Lisp_Object handlers, body;
	    handlers = POP;
	    body = POP;
867
	    BEFORE_POTENTIAL_GC ();
868
	    TOP = internal_lisp_condition_case (TOP, body, handlers);
869 870 871
	    AFTER_POTENTIAL_GC ();
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
872 873

	case Btemp_output_buffer_setup:
874
	  BEFORE_POTENTIAL_GC ();
875
	  CHECK_STRING (TOP);
876
	  temp_output_buffer_setup (SDATA (TOP));
877
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
878 879 880 881
	  TOP = Vstandard_output;
	  break;

	case Btemp_output_buffer_show:
882 883 884
	  {
	    Lisp_Object v1;
	    BEFORE_POTENTIAL_GC ();
885
	    v1 = POP;
886 887 888
	    temp_output_buffer_show (TOP);
	    TOP = v1;
	    /* pop binding of standard-output */
Juanma Barranquero's avatar
Juanma Barranquero committed
889
	    unbind_to (SPECPDL_INDEX () - 1, Qnil);
890 891 892
	    AFTER_POTENTIAL_GC ();
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
893 894

	case Bnth:
895 896
	  {
	    Lisp_Object v1, v2;
897
	    BEFORE_POTENTIAL_GC ();
898 899
	    v1 = POP;
	    v2 = TOP;
900
	    CHECK_NUMBER (v2);
901
	    AFTER_POTENTIAL_GC ();
902 903
	    op = XINT (v2);
	    immediate_quit = 1;
904 905
	    while (--op >= 0 && CONSP (v1))
	      v1 = XCDR (v1);
906
	    immediate_quit = 0;
907
	    TOP = CAR (v1);
908 909
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
910 911

	case Bsymbolp:
912
	  TOP = SYMBOLP (TOP) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
913 914 915 916 917 918 919
	  break;

	case Bconsp:
	  TOP = CONSP (TOP) ? Qt : Qnil;
	  break;

	case Bstringp:
920
	  TOP = STRINGP (TOP) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
921 922 923
	  break;

	case Blistp:
Joseph Arceneaux's avatar
Joseph Arceneaux committed
924
	  TOP = CONSP (TOP) || NILP (TOP) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
925 926 927
	  break;

	case Bnot:
Joseph Arceneaux's avatar
Joseph Arceneaux committed
928
	  TOP = NILP (TOP) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
929 930 931
	  break;

	case Bcons:
932 933 934 935 936 937
	  {
	    Lisp_Object v1;
	    v1 = POP;
	    TOP = Fcons (TOP, v1);
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
938 939 940 941 942 943

	case Blist1:
	  TOP = Fcons (TOP, Qnil);
	  break;

	case Blist2:
944 945 946 947 948 949
	  {
	    Lisp_Object v1;
	    v1 = POP;
	    TOP = Fcons (TOP, Fcons (v1, Qnil));
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
950 951

	case Blist3:
952
	  DISCARD (2);
Jim Blandy's avatar
Jim Blandy committed
953 954 955 956
	  TOP = Flist (3, &TOP);
	  break;

	case Blist4:
957
	  DISCARD (3);
Jim Blandy's avatar
Jim Blandy committed
958 959 960
	  TOP = Flist (4, &TOP);
	  break;

961 962 963 964 965 966
	case BlistN:
	  op = FETCH;
	  DISCARD (op - 1);
	  TOP = Flist (op, &TOP);
	  break;

Jim Blandy's avatar
Jim Blandy committed
967
	case Blength:
968
	  BEFORE_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
969
	  TOP = Flength (TOP);
970
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
971 972 973
	  break;

	case Baref:
974 975
	  {
	    Lisp_Object v1;
976
	    BEFORE_POTENTIAL_GC ();
977 978
	    v1 = POP;
	    TOP = Faref (TOP, v1);
979
	    AFTER_POTENTIAL_GC ();
980 981
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
982 983

	case Baset:
984 985
	  {
	    Lisp_Object v1, v2;
986
	    BEFORE_POTENTIAL_GC ();
987 988
	    v2 = POP; v1 = POP;
	    TOP = Faset (TOP, v1, v2);
989
	    AFTER_POTENTIAL_GC ();
990 991
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
992 993

	case Bsymbol_value:
994
	  BEFORE_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
995
	  TOP = Fsymbol_value (TOP);
996
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
997 998 999
	  break;

	case Bsymbol_function:
1000
	  BEFORE_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
1001
	  TOP = Fsymbol_function (TOP);
1002
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
1003 1004 1005
	  break;

	case Bset:
1006 1007
	  {
	    Lisp_Object v1;
1008
	    BEFORE_POTENTIAL_GC ();
1009 1010
	    v1 = POP;
	    TOP = Fset (TOP, v1);